US3670868A - Magnetic conveyor system - Google Patents

Magnetic conveyor system Download PDF

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Publication number
US3670868A
US3670868A US52153A US3670868DA US3670868A US 3670868 A US3670868 A US 3670868A US 52153 A US52153 A US 52153A US 3670868D A US3670868D A US 3670868DA US 3670868 A US3670868 A US 3670868A
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US
United States
Prior art keywords
roller
pole pieces
plane
polygonal
magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US52153A
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English (en)
Inventor
Oliver W Gnage
Gordon F Connelly
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of US3670868A publication Critical patent/US3670868A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6529—Transporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G35/00—Mechanical conveyors not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2812/00—Indexing codes relating to the kind or type of conveyors
    • B65G2812/99—Conveyor systems not otherwise provided for

Definitions

  • ABSTRACT is attached a pole piece. These pole pieces each have a larger diameter than the magnet to form a groove between the magnet and the pole pieces. This groove is filled with a nonconductive ring or annulus which extends outwardly beyond the edges of the pole pieces to provide a tire or friction bearing surface for the plates or elements to be transported thereby.
  • the plates can be moved from an approach plane to an exit plane by means of a polygonal-shaped roller which is provided at the intersection of the planes and which has alternating flats and ridges so that when an advancing plate engages a polygonal roller and has passed the last round roller in the approach plane it will be rotated with the polygonal roller due to attraction to one of the flats to the exit plane and be fed forwardly by the round rollers in the exit plane.
  • a stripper bar is provided between the last roller and the polygonal roller which prevents the trailing end of the plate from following the last roller around.
  • the entire roller can be encapsulated in a nonmagnetic material.
  • This invention relates to a magnetic conveyor'system and more particularly to magnetic rollers for transporting flat plates, such as photoconductive elements through a plurality of electrophotographic stations.
  • Roller conveyors including magnetic rollers, are well known for transporting articles of various types but such conveying devices are often noisy andmay damage the article being transported or may be damaged themselves if the environment in which they are used is corrosive.
  • a conveyor system for transporting magnetically attractible flat plates along a path having an approach plane and an exit plane at an angle to the approach plane.
  • a first set of magnetic rollers are located along the approach plane and a second set of magnetic rollers are located along the exit plane.
  • a polygonal roller which has alternating flats and ridges with one of the flats being engageable with a plate as it leaves the last roller of the first set to pivot the plate from the approach plane to the exit plane into engagement with the first roller of the second set.
  • Each of these rollers includes a bar magnet having opposite poles at the opposite ends thereof and pole pieces attractible to each of the poles.
  • A' ring or annulus of nonmagnetic material is provided in the groove formed by the pole pieces to form a nonmagnetic tire or friction bearing surface for supporting and transporting the photoconductive chips on either the underside or top side of the rollers as work functions are performedon the chips.
  • This nonmagnetic material may extend just slightly beyond the pole pieces so that the chip does not rest directly on the metal pole pieces but is still influenced by the magnetic field therebetween.
  • the conveyor system contemplates round rollers on nonmagnetic shafts in the approach and exit planes with a polygonal roller therebetween to change the plane in which the chips move.
  • a stripping bar is provided between the last roller of the approach plane and the polygonal roller to separate the trailing end of the chip from the last roller so that it does not follow it around.
  • the material also reduces noise between the chips and the rollers and reduces corrosion of the rollers from developing liquid which may get on the rollers from the chips.
  • the insulating material can be coated over the entire roller, including the pole pieces to further reduce the change of corrosion.
  • FIG. 1 is a diagrammatic side elevation of an electrophotographic device having a conveyor system including magnetic rollers, constructed in accordance with this invention
  • FIG. 2 is an enlarged fragmentary side elevation of a portion of the conveyor system of FIG. 1, showing means for moving a photoconductive chip from an approach plane to an exit plane;
  • FIG. 3 is a perspective view of a set of rollers constructed in accordance with this invention.
  • FIG. 4 is a section through one of the rollers of FIG. 3 taken along lines 4--4 thereof;
  • FIG. 5 is a perspective view, similar to FIG. 3, but showing a set of polygonal rollers.
  • FIG. 6 is a section similar to FIG. 4, but showing an alternative embodiment.
  • FIG. 1 Such a system is disclosed schematically in FIG. 1 wherein a plurality of photoconductive elements or chips 4 are stored in a storage compartment 2. Chips 4 are received in the storage compartment at the upper end thereof and they are dispensed.
  • the chips are then fed seriau'm from the bottom of the storage compartment by a pusher mechanism 6 and advanced by a plurality of spaced rollers 8, which may be magnetic rollers as hereinafter disclosed.
  • the photoconductive chips are fed by magnetic rollers 8, mounted on shafts 9 past a charging station 10, such as a corona charging device and onto a multi-sided roller 12 which changes the direction of the chip to cause it to be moved down by additional rollers 8 to a lower plane.
  • the chip again changes direction due to coming in contact with a further multisurfaced roller 12 so that it begins moving in the reversed direction to its initial direction to an exposure station 14 where the charged surface is exposed to an image from an
  • a further multisurfaced roller 12 it is necessary to periodically cause the chip to change directions by turning them from an approach plane. This is accomplished by means of polygonalrollers 12.
  • FIG. 2 it can be seen that a chip 4 is initially in an approach plane 32 and is transported therealong by rollers 8 to polygonal roller 12 which then rotates the chip as shown in dotted lines until it lies in exit plane 34 and is advanced by a roller 8 adjacent the exit plane.
  • a nonconductive means such as stripping bar 40 is provided between roller 8 and polygonal roller 12, as shown' which maintains the trailing end of chip 4 in approach plane 32 until it can be swung in a counterclockwise direction, as viewed in FIG. 2 by polygonal roller 12.
  • a pair of spaced rollers 8 are illustrated in FIG. 3 as mounted on a shaft 9, as shown which may be coated with nonconductive material 42.
  • the rollers are illustrated as being attached to shaft 9 by means of nonconductive sleeves 44 connected to the shaft, as by a set screw 46, as shown in FIG. 4.
  • Each roller comprises a bar magnet 48, which in the case. of roller 8 is cylindrical, one end thereof being the north pole and the other the south pole to which are attached pole pieces 50 and 52, respectively.
  • pole pieces have a diameter slightly greater than that of magnet 48 so. as to form a groove 54 therebetween in which is placed a nonconductive material, such as polyurethane, which is in the fonn of a ring or annulus 56 extending around the magnet in the groove 54.
  • Ring 56 conveniently extends beyond the edges of pole pieces 50 and 52 to serve as a tire so that a chip supported thereon will not make metal-to-metal contact between the chip and the edges of thepole pieces to reduce noise.
  • a spacing between the edges of the pole piece and the edge of the tire 56 of 0.005 inches has been found satisfactory.
  • the diameter of the pole pieces can be 0.010 inches greater than the diameter of the magnet. With this spacing or a greater spacing, the chip is still within the magnetic field of the pole pieces so that it is held firmly against the roller.
  • the spacing indicated is by way of example and can be greater or smaller as required includes magnetic rollers for advancing photoconductive chips through a circuitous path and provides means for moving the chips from an approach plane to an exit plane by means of a polygonal roller.
  • a stripping device is provided adjacent the last roller adjacent the approach plane for assuring that the trailing end of the photoconductive chip is separated for a particular application.
  • FIG. 6 An alternative embodiment is shown in FIG. 6 wherein a coating 68 completely covers rollers 8, filling groove 54 and extending over the ends and sides of pole pieces 50 and 52.
  • This structure may be desirable if the photoconductive chips have corrosive material on them, such as developer.
  • a conveyor system has been provided which from the roller so that the polygonal roller can turn the chip into the exit plane.
  • Each roller is constructed with a bar magnet core to which pole pieces are attached and extend beyond the edges of the magnet to form a groove which may be filled with a ring or annulus of nonconductive material to serve as a tire for the photoconductive chips.
  • the chips can be conveyed on either the top side or underside of the rollers as work functions are performed on the chips.
  • the nonconductive material can completely coat the pole pieces to protect them from any corrosive materials that may come in contact therewith.
  • first generally cylindrical magnetic roller rotatably mounted along said feed path at a location for moving such plates along said approach plane
  • second generally cylindrical magnetic roller rotatably mounted along said feed path at a location for moving such plates along said exit plane
  • a conveyor system located along said feed path between said first roller and said polygonal roller, for stripping the trailing end of the plate from said first roller.
  • each of said rollers includes:
  • a bar magnet having opposite poles at first and second opposite ends thereof;
  • annulus of non-magnetic material mounted in said peripheral groove, said annulus having a larger diameter than said first and second pole pieces so that saidannulus periphery contacts and transports such plates.
  • a magnetic conveyor device for transporting magnetically attractable articles along a path, said device comprising:
  • a magnetic conveyor device as claimed in claim 4 wherein:
  • said annulus has a diameter greater than said first and second pole pieces.
  • a magnetic conveyor device as claimed in claim 5 wherein the diameter of said ring is at least 0.010 inches greater than the diameter of said pole pieces. 5

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
US52153A 1970-07-06 1970-07-06 Magnetic conveyor system Expired - Lifetime US3670868A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5215370A 1970-07-06 1970-07-06

Publications (1)

Publication Number Publication Date
US3670868A true US3670868A (en) 1972-06-20

Family

ID=21975811

Family Applications (1)

Application Number Title Priority Date Filing Date
US52153A Expired - Lifetime US3670868A (en) 1970-07-06 1970-07-06 Magnetic conveyor system

Country Status (4)

Country Link
US (1) US3670868A (OSRAM)
CA (1) CA934317A (OSRAM)
DE (1) DE2133385A1 (OSRAM)
FR (1) FR2098187B1 (OSRAM)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920132A (en) * 1971-12-16 1975-11-18 British Steel Corp Materials handling device
CN101891059A (zh) * 2010-06-18 2010-11-24 无锡威华电焊机制造有限公司 钢筋网生产线横筋排料机构的转筒

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149403A (en) * 1962-03-28 1964-09-22 Maremont Corp Molded magnetic rolls
US3352397A (en) * 1964-07-08 1967-11-14 Demag Zug Gmbh Device for controlling the speed of movement of an object

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149403A (en) * 1962-03-28 1964-09-22 Maremont Corp Molded magnetic rolls
US3352397A (en) * 1964-07-08 1967-11-14 Demag Zug Gmbh Device for controlling the speed of movement of an object

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920132A (en) * 1971-12-16 1975-11-18 British Steel Corp Materials handling device
CN101891059A (zh) * 2010-06-18 2010-11-24 无锡威华电焊机制造有限公司 钢筋网生产线横筋排料机构的转筒

Also Published As

Publication number Publication date
FR2098187A1 (OSRAM) 1972-03-10
FR2098187B1 (OSRAM) 1974-09-27
CA934317A (en) 1973-09-25
DE2133385A1 (de) 1972-01-13

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